when you take professional pics with your horse, you either wear your showmanship outfit, your english outfit, or blue jeans, a sliver belt buckle, a nice top/blouse that looks good on you & with your horse, and a western hat.
if you can't ride at there level, you shouldn't be riding there. i know that i hate it when inexperienced people ride with me, because it takes out the fun, no offense. you should ride at a camp with your level, or just take private lessons.